IOh and this: "Nobody is born with perfect pitch, because it is a 100% learned skill (the exact frequencies of the musical scales are arbitrary human concoctions -- there is no natural law that says that middle A should be 440 Hz)."Isn't that like saying "Everybody is born color-blind, because seeing colors is a 100% learned skill (color names are human concoctions - there is no natural law that says blue is that color)"Perfect pitch is the ability to reckognize frequencies, not notes. Later in life you learn that certain frequencies correspond to notes, but the ability to discern the frequencies is something you are born with. You can only acquire relative pitch, which maybe was what you were reffering to.